[S390] mmap: add missing compat_ptr conversion to both mmap compat syscalls

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 16 insertions, 25 deletions

diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 22c9e557bb22..11c3aba664ea 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -616,44 +616,35 @@ asmlinkage long sys32_fstatat64(unsigned int dfd, char __user *filename,
  */
 
 struct mmap_arg_struct_emu31 {
-        u32     addr;
-        u32     len;
-        u32     prot;
-        u32     flags;
-        u32     fd;
-        u32     offset;
+        compat_ulong_t addr;
+        compat_ulong_t len;
+        compat_ulong_t prot;
+        compat_ulong_t flags;
+        compat_ulong_t fd;
+        compat_ulong_t offset;
 };
 
-asmlinkage unsigned long
-old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
+asmlinkage unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg)
 {
         struct mmap_arg_struct_emu31 a;
-        int error = -EFAULT;
 
         if (copy_from_user(&a, arg, sizeof(a)))
-                goto out;
-
-        error = -EINVAL;
+                return -EFAULT;
         if (a.offset & ~PAGE_MASK)
-                goto out;
-
-        error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
-                               a.offset >> PAGE_SHIFT);
-out:
-        return error;
+                return -EINVAL;
+        a.addr = (unsigned long) compat_ptr(a.addr);
+        return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
+                              a.offset >> PAGE_SHIFT);
 }
 
-asmlinkage long 
-sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
+asmlinkage long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg)
 {
         struct mmap_arg_struct_emu31 a;
-        int error = -EFAULT;
 
         if (copy_from_user(&a, arg, sizeof(a)))
-                goto out;
-        error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
-out:
-        return error;
+                return -EFAULT;
+        a.addr = (unsigned long) compat_ptr(a.addr);
+        return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
 }
 
 asmlinkage long sys32_read(unsigned int fd, char __user * buf, size_t count)